There's a piece of the registration process that allows for a shortcut, and it was used in a particular way for the two accounts. Let's call it a "registation signature", and it matches other fake accounts. If I hadn't been working on that part of the website I wouldn't have noticed.
On the other hand, commendable attention as been paid to keep them "non-ghost": they look less like the same user than you and Zak for example. So I wrote "likely" --there is still 1 in 2<some large number>
chances that I'm wrong.
And I'm still confused on the 'why'. Dunno, motivational ghosts?
The part that has been annoying me is that I've spent time to clean up the code, but if I put the new version on the website stuff like this might go unnoticed. So, why am I even doing it?